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ATERWAYS : : TECTIN ING OU S TORM RMWATER P OL OLLUTION R EDUCT - PowerPoint PPT Presentation

Dec 26, 2023 •105 likes •379 views

P ROTE OUR W AT ATERWAYS : : TECTIN ING OU S TORM RMWATER P OL OLLUTION R EDUCT ION E FFOR CTIO ORTS TS Public Information Meeting ~ May 2, 2018 Public Works Stormwater Management Division O VER ERVIEW EW Surface Water Quality

  1. P ROTE OUR W AT ATERWAYS : : TECTIN ING OU S TORM RMWATER P OL OLLUTION R EDUCT ION E FFOR CTIO ORTS TS Public Information Meeting ~ May 2, 2018 Public Works Stormwater Management Division

  2. O VER ERVIEW EW ▪ Surface Water Quality Protection ▪ Municipal Separate Storm Sewer System Program ~ MS4 Program ▪ Stormwater Pollution Reductions o Chesapeake Bay Watershed impacted by phosphorus, nitrogen, and sediment o Waterways impacted by phosphorus o Waterways impacted by bacteria ▪ A Balanced Approach ▪ Summary 2

  3. DEQ EQ S S URFA FACE W ATER Q UAL ALITY P RO ROTECTI TION ▪ Virginia Department of Environmental Quality (DEQ) o Oversight of Virginia Water Quality Standards to protect reasonable public uses and support the growth of aquatic life ▪ Water Quality Monitoring for Surface Waters o Performs annual water quality monitoring o 33 stations in Virginia Beach o Develops a water quality assessment every two years 3

  4. DEQ EQ S S URFA FACE W ATER Q UAL ALITY P RO ROTECTI TION ▪ Identify Impaired Waterways o Waterways are identified in a list if they have pollutants that exceed water quality standards ▪ Establish Pollutant Budgets (Total Maximum Daily Load = TMDL) o Waterways are analyzed to determine what amount of pollution they can handle without exceeding water quality standards o A pollution budget is set for the City’s discharge of stormwater runoff 4

  5. L OCAL I MPAIRED W ATERWAYS 30 Waterways have Pollution Budgets or Total Maximum Daily Loads (TMDLs) • Chesapeake Bay • 14 Impaired Waterways • 3 Chesapeake Bay Watersheds • Atlantic Ocean • TMDL under development • Southern Rivers • 13 Impaired Waterways

  6. V IRGIN IA B EACH S URFA FACE W ATERS INIA ▪ Land Area 241 square miles Pri rimary ry Water ersheds heds ▪ Population ~450,000 ▪ More than 550 miles of streams Chesapeake Bay ▪ Primary Watersheds Southern Rivers ▪ Chesapeake Bay Atlantic ▪ Atlantic Ocean Ocean ▪ Southern Rivers / Albemarle Sound 6

  7. MS MS4 P P ERMIT O VERVIEW ▪ Required by EPA under the Clean Water Act o Addresses the area of land that drains to the City’s stormwater outfalls that discharge to surface waters ▪ Effective July 1, 2016 (5 year term) o Compliance oversight by the Stormwater Management Division o Requires pollution prevention from the stormwater system ▪ Requires pollution reductions for watersheds with established pollution budgets for the City o City must develop and submit TMDL Action Plans to DEQ by June 30, 2018 7

  8. TMD MDL A A CT ION P LAN AN R EQUIREM CTIO EMEN ENTS CHESAPEAKE BAY ~ PHOSPHORUS, LOCAL PHOSPHORUS AND BACTERIA NITROGEN, AND SEDIMENT ▪ Identify the TMDL, source of pollution, and ▪ Delineate the service area of the pollution budget by DEQ stormwater system (MS4 service area) ▪ Identify and maintain an updated list of all ▪ Estimate the pollutant loading and additional management practices, control techniques and engineering methods that required pollutant reductions from the reduce these pollutants MS4 service area ▪ Evaluate all City facilities for these pollution ▪ Identify the management practices and sources retrofit programs that will be used to ▪ Develop and implement a method to assess meet the reductions for this permit effectiveness of the plan term ▪ Estimate an end date for meeting the pollution ▪ Achieve pollutant reductions over three budget assigned by DEQ using an adaptive iterative approach over multiple permit cycles permit cycles or 15 years 8

  9. S TORMWATER P OLLU LUTION R EDUCT CTIO IONS C HESAPEAKE B AY AY TMD MDL ▪ Issued by EPA in December 2010 ▪ Affects Virginia, West Virginia, the District of Columbia, Maryland, Delaware, Pennsylvania, and New York ▪ Pollutant Reductions for phosphorus, nitrogen, and sediment ▪ Virginia developed a Watershed Implementation Plan (WIP) Phase I and II that allocates pollutant reductions to MS4s Chesapeake Bay TMDL Area 9

  10. S TORMWATE TER P OLLUTIO ION R EDUCTIONS NS C HESA SAPEAKE B AY TMDL A A CTION P LAN AN Pollutant Reductions Required ▪ MS4 Permit requires a First Phase TMDL by June 30, 2021 Action Plan to reduce 5.75% of the total estimated nutrients and sediment by the (pounds/year) end of this permit term ▪ Accounting for Stormwater Management Watershe hed Phospho phorus us Nitrogen Sedim diment Facility Construction Elizabeth ▪ Credit for past actions ~ Facilities constructed 58 241 26,476 River between 2006-2009 Lynnhaven ▪ Redevelopment Projects from July 1, 2014 144 643 50,600 River ▪ Construction of Water Quality Little Creek 29 144 10,585 Improvement Projects ▪ Street Sweeping Program 10

  11. S TORMWATE TER P OLLUTIO ION R EDUCTIONS NS C HESA SAPEAKE B AY TMDL ~ ~ L OOK OOKING F ORWA WARD ▪ DEQ will require the total Total Pollutant Reductions Required pollutant reductions over 3 (pounds/year) permit cycles or 15 years Watershe hed Phospho phorus us Nitrogen Sedim diment Elizabeth ▪ Pollutant Reduction Strategy 1,000 4,200 460,450 River ▪ Stormwater Management Facility Lynnhaven 2,510 11,190 880,000 Construction River ▪ Street Sweeping Program Little Creek 500 2,510 184,090 ▪ Nutrient and Sediment Trading Totals To 4, 4,010 010 17, 17,90 900 1, 1,524 524,54 540 ▪ Agreement with HRSD Reductions shown are for all three implementation phases 11

  12. HRS RSD AND ND C ITY OF V IRGIN IA B EACH P ARTNER INIA NERSHIP ▪ EPA recommends an Integrated Planning Approach for both stormwater and wastewater to work together to meet the Chesapeake Bay TMDL requirements ▪ Virginia Regulations allow trading of pollutant reductions between the Hampton Roads Sanitation District (HRSD) and the City of Virginia Beach. ▪ City must achieve 5% of the total reductions for the First Phase Chesapeake Bay pollutant reductions ▪ Virginia Beach will continue to work to minimize the amount of credits needed from HRSD for nutrient and sediment pollutant reductions 12

  13. S TORMWATE TER P OLLUTIO ION R EDUCTIONS NS P HOSPHO RUS TMDL S PHORU ▪ Watersheds with pollution limits for phosphorus are in the Southern Rivers Watershed ▪ TMDLs established by DEQ between 2011 and 2014 ▪ Require phosphorus pollutant reductions within ▪ North Landing River Watershed ▪ Ashville Bridge Creek Watershed ▪ Pocaty Watershed ▪ Northwest River Watershed Phosphorus TMDL Areas 13

  14. S OURCES OF P HOSPHORUS P OLLUTION  Pet waste  Lawn fertilizer  Septic systems  Livestock waste  Waterfowl (ducks, geese)

  15. I MPACTS OF P HOSPHOR HORUS P OLLU LUTION ▪ Excess algae ▪ Depleted oxygen ▪ Fish kills ▪ Foul odors ▪ Unsuitable for recreation 15

  16. S TORMWATER P OLLU LUTION R EDUCT CTIO IONS L OCA CAL P HOSP RUS TM TMDL DL S SPHORU • Pollutant Reduction Strategy Total Pollutant Reductions Required (pounds/year) • Stormwater Management Facility Construction Watershed Phosphorus • New facilities North Landing 775 River • Improvements to existing facilities Ashville Bridge 35 • Street Sweeping Program Creek • Targeted Outreach Programs Pocaty River 5 Northwest River 5 Totals 820 16

  17. P ROGRAMS MS T ARGETE AT P REVENT NG P HOSPHO TED AT NTING PHORUS P OLLUTION ON ▪ Pick up after your pet ▪ Don’t feed geese and ducks ▪ Leave grass clippings on the lawn ▪ Sweep up grass on pavement ▪ Use fertilizer sparingly ▪ Test your soil to know what it needs ▪ Choose slow-release fertilizers ▪ Apply in dry weather and at the right time of year ▪ Sweep excess fertilizer off pavement ▪ Maintain your septic system properly 17

  18. S TORMWATE TER P OLLUTIO ION R EDUCTIONS NS B ACTERI RIA TMDL S ▪ Watersheds with pollution limits for bacteria are citywide affecting all three primary watersheds ▪ TMDLs Established by DEQ between 2004 and 2014 ▪ Require Bacteria pollutant reductions ▪ Fecal Coliform, E. Coli, and Enterococci Bacteria TMDL Areas 18

  19. S TORMWATER P OLLU LUTION R EDUCT CTIO IONS L OCA CAL B AC RIA TMD MDL S ACTERI • Pollutant Reduction Strategy • Targeted Outreach Programs • Stormwater Management Bow Creek Facility Construction • New facilities • Improvements to existing facilities City View 19

  20. T ARG RGETED O UTRE REACH P RO ROGRAM RAMS (N (N ON ON -S TR RAL P RACT ICES ) TRUCTU TURAL CTIC ▪ Pet Waste Management Program ▪ Pet Waste Disposal Stations ▪ Meadow Management ▪ Prohibit Feeding of Waterfowl on Public Lands ▪ Septic-to-Sewer Conversions Don’t feed the ▪ Education and Outreach for Boaters on wildlife Proper Dumping Practices Scoop, bag and trash dog waste 20

  21. S TORMWATER M ANAGEM ENT F ACIL EMENT ILIT ITIE IES (S (S TRU RAL P RACT ICES ) RUCTURA CTIC BMP Number Bioretention 93 Constructed Wetlands 4 Dry Swales 6 Extended Detention Pond 227 Filtering Manufactured Device 201 Grass Channels 4 Hydrodynamic Manufactured Device 83 Infiltration Practices 214 Permeable Pavement 47 Sheet Flow to Open Space 1 Wet Pond 169 Wet Swales 3 21

  22. S TORM RMWATER P OL OLLUTION R EDU DUCTIONS L OC OCAL B ACTERIA TMD MDL S • Pollutant Reduction Strategy • Targeted Outreach Programs • Adaptive Iterative Approach Modify Implement Projects & Projects & • Citywide and Watershed focused Programs Programs • Stormwater Management Facility Construction Evaluate Project • New facilities & Program Effectiveness • Improvements to existing facilities 22

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